From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2FC2AFA372C for ; Fri, 8 Nov 2019 17:02:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EFB9E206BA for ; Fri, 8 Nov 2019 17:02:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573232550; bh=QmHkYOpw1KGgzE2tChTjH11DwvScC47O6EYYkdjmNZY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ZWncPrVcEQ1qsuwbn1pfCfpEelbrS/m8dHVkUqMeMiquA3CsP6EuDXdGCkidOl1Zn 3s/MXMZBlWg4/Jpgtni0Vum35f9nZYe4iPrN0EXqJSEC+IS5OeM5g8rM7zQKv8r7Ac gEqR2RcIAK4Tx5Tn46txkmEt6PO/tgPpKg54tix8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731558AbfKHRC2 (ORCPT ); Fri, 8 Nov 2019 12:02:28 -0500 Received: from mail.kernel.org ([198.145.29.99]:45710 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730696AbfKHRBu (ORCPT ); Fri, 8 Nov 2019 12:01:50 -0500 Received: from localhost.localdomain (236.31.169.217.in-addr.arpa [217.169.31.236]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 89DF1206BA; Fri, 8 Nov 2019 17:01:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573232509; bh=QmHkYOpw1KGgzE2tChTjH11DwvScC47O6EYYkdjmNZY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=oiUzlVfUY9/EMo4arLdR3YvvgWtVrcBioNWxyo4tDqVikPDfd/hMfuNPavpmeFf5b fiotcwLuwgXiNdGNjLCGDs4cH4YGNrU4D2GdrgLklRE5kQEyEWDKv6ShvlqifQtJp8 C/qEBtT80YOw5LyKOpZZ03WsFbgZ4XIOvxTT9/+E= From: Will Deacon To: linux-kernel@vger.kernel.org Cc: Will Deacon , Yunjae Lee , SeongJae Park , "Paul E. McKenney" , Josh Triplett , Matt Turner , Ivan Kokshaysky , Richard Henderson , Peter Zijlstra , Alan Stern , Michael Ellerman , "Michael S. Tsirkin" , Jason Wang , Arnd Bergmann , Joe Perches , Boqun Feng , linux-alpha@vger.kernel.org, virtualization@lists.linux-foundation.org Subject: [PATCH 06/13] READ_ONCE: Remove smp_read_barrier_depends() invocation Date: Fri, 8 Nov 2019 17:01:13 +0000 Message-Id: <20191108170120.22331-7-will@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191108170120.22331-1-will@kernel.org> References: <20191108170120.22331-1-will@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Alpha overrides '__read_once_size_n()' directly, so there's no need to use 'smp_read_barrier_depends()' in the core code. Signed-off-by: Will Deacon --- include/asm-generic/rwonce.h | 1 - 1 file changed, 1 deletion(-) diff --git a/include/asm-generic/rwonce.h b/include/asm-generic/rwonce.h index 2c2ac0948c94..2e3289268a89 100644 --- a/include/asm-generic/rwonce.h +++ b/include/asm-generic/rwonce.h @@ -102,7 +102,6 @@ static __always_inline void __write_once_size(volatile void *p, void *res, int s __read_once_size(&(x), __u.__c, sizeof(x)); \ else \ __read_once_size_nocheck(&(x), __u.__c, sizeof(x)); \ - smp_read_barrier_depends(); /* Enforce dependency ordering from x */ \ __u.__val; \ }) #define READ_ONCE(x) __READ_ONCE(x, 1) -- 2.24.0.rc1.363.gb1bccd3e3d-goog